/*++

  Copyright (c) 2004  - 2014, Intel Corporation. All rights reserved.<BR>
                                                                                   
  SPDX-License-Identifier: BSD-2-Clause-Patent

                                                                                   

  Define APIs to retrieve USB Host Controller Info such as controller type and
  I/O Port Base Address.


**/

#ifndef _PEI_USB_CONTROLLER_PPI_H_
#define _PEI_USB_CONTROLLER_PPI_H_

//
// Global ID for the PEI_USB_CONTROLLER_PPI.
//
#define PEI_USB_CONTROLLER_PPI_GUID \
  { \
    0x3bc1f6de, 0x693e, 0x4547,{ 0xa3, 0x0, 0x21, 0x82, 0x3c, 0xa4, 0x20, 0xb2} \
  }

//
// Forward declaration for the PEI_USB_CONTROLLER_PPI.
//
typedef struct _PEI_USB_CONTROLLER_PPI PEI_USB_CONTROLLER_PPI;

//
// This bit is used in the ControllerType return parameter of GetUsbController()
// to identify the USB Host Controller type as UHCI
//
#define PEI_UHCI_CONTROLLER 0x01

//
// This bit is used in the ControllerType return parameter of GetUsbController()
// to identify the USB Host Controller type as OHCI
//
#define PEI_OHCI_CONTROLLER 0x02

//
// This bit is used in the ControllerType return parameter of GetUsbController()
// to identify the USB Host Controller type as EHCI
//
#define PEI_EHCI_CONTROLLER 0x03

/**
  Retrieve USB Host Controller Info such as controller type and I/O Base Address.

  @param[in]  PeiServices      The pointer to the PEI Services Table.
  @param[in]  This             The pointer to this instance of the PEI_USB_CONTROLLER_PPI.
  @param[in]  ControllerId     The ID of the USB controller.
  @param[out] ControllerType   On output, returns the type of the USB controller.
  @param[out] BaseAddress      On output, returns the base address of UHCI's I/O ports
                               if UHCI is enabled or the base address of EHCI's MMIO
                               if EHCI is enabled.

  @retval EFI_SUCCESS             USB controller attributes were returned successfully.
  @retval EFI_INVALID_PARAMETER   ControllerId is greater than the maximum number
                                  of USB controller supported by this platform.

**/
typedef
EFI_STATUS
(EFIAPI *PEI_GET_USB_CONTROLLER)(
  IN  EFI_PEI_SERVICES        **PeiServices,
  IN  PEI_USB_CONTROLLER_PPI  *This,
  IN  UINT8                   UsbControllerId,
  OUT UINTN                   *ControllerType,
  OUT UINTN                   *BaseAddress
  );

//
// This PPI contains a single service to retrieve the USB Host Controller type
// and the base address of the I/O ports used to access the USB Host Controller.
//
struct _PEI_USB_CONTROLLER_PPI {
  PEI_GET_USB_CONTROLLER  GetUsbController;
};

extern EFI_GUID gPeiUsbControllerPpiGuid;

#endif
